package cn.followtry.zk.example.discovery;

import java.io.Closeable;
import java.io.IOException;
import org.apache.curator.framework.CuratorFramework;
import org.apache.curator.utils.CloseableUtils;
import org.apache.curator.x.discovery.ServiceDiscovery;
import org.apache.curator.x.discovery.ServiceDiscoveryBuilder;
import org.apache.curator.x.discovery.ServiceInstance;
import org.apache.curator.x.discovery.UriSpec;
import org.apache.curator.x.discovery.details.JsonInstanceSerializer;

/**
 * Created by followtry on 2017/5/31.
 */
public class ExampleServer implements Closeable {
  private final ServiceDiscovery<InstanceDetails> serviceDiscovery;
  private final ServiceInstance<InstanceDetails> thisInstance;
  
  public ExampleServer(CuratorFramework client,String path,String serviceName,String description) throws Exception
  {
    // in a real application, you'd have a convention of some kind for the URI layout
    UriSpec uriSpec = new UriSpec("{scheme}://foo.com:{port}");
    
    thisInstance = ServiceInstance.<InstanceDetails>builder()
            .name(serviceName)
            .payload(new InstanceDetails(description))
            .port((int)(65535 * Math.random())) // in a real application, you'd use a common port
            .uriSpec(uriSpec)
            .build();
    
    // if you mark your payload class with @JsonRootName the provided JsonInstanceSerializer will work
    JsonInstanceSerializer<InstanceDetails> serializer = new JsonInstanceSerializer<InstanceDetails>(InstanceDetails.class);
    
    serviceDiscovery = ServiceDiscoveryBuilder.builder(InstanceDetails.class)
            .client(client)
            .basePath(path)
            .serializer(serializer)
            .thisInstance(thisInstance)
            .build();
  }
  
  public ServiceInstance<InstanceDetails> getThisInstance()
  {
    return thisInstance;
  }
  
  public void start() throws Exception
  {
    serviceDiscovery.start();
  }
  
  @Override
  public void close() throws IOException
  {
    CloseableUtils.closeQuietly(serviceDiscovery);
  }
}
